New Chelsea boss Mauricio Pochettino is eager to keep hold of Kai Havertz.
The Germany attacker is a target for Real Madrid this summer.
AS says Real are readying a bid for Havertz, though face a battle as Pochettino is desperate not to lose the attacker.
Indeed, it's suggested the new manager views Havertz as an "essential" player for the new season.
Havertz has a deal at Chelsea to 2025.
